Method of preparing pipe coils for casting



Dec. 14 1926. 2

w. JENKINSON ETAL METHOD OF PREPARING PIPE GOILS FOR CASTING Filed March 19, 1924 Compressed Air Vz'tmss Inventors.

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WALTERI JENKINSON, on PHILADELPHIA, Anni Joint i s PENNSYLVANIA.

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' Application fiIedMarch"19,V1924. Serial No. 700,21

This invention relates to'a method of preparing pipes around which blocksof metal are to be cast, [and more particularly to a method of packing copper pipe in the form 1 5 of a coil, around Which blocks or'con'tact jmembers areto be'cast inthe-forming'oi electrode holders such as shoWnfandfd e-j scribed inthe Johnson Hughes Patent No;

1,335,895; dated April 6,1920.- 10

' In the drawings; Figure lshowsone form of apparatus, used in carrying out the method of this a'pplication;

Johnson Hughes Patent No. 1 1 83558915, 'of V iieferring more particularly to the'dravv- 25 ings, the letter A-. clesignates-the pipe'coil as a Whole, which is .to be paekedwith sand prior to the casting of theblocks or contacts 2 around the same, to form the finished coil of Figure 2. I

In carrying out the method of this inven- With a suitable cap 3 having a vent opening l therein, and therotlier or openend is connected by a pipe unlon coupl ng member mediate its ends with a sand supply pipe 11' which communicates'at its upper end with alhopperl8 having a slide valve 9 for regulatingthe flow o'f sand through the pipe 7.

The upper end of the pipe 6 is connected to a compressed air supply pipe 10 having a regulating Valve 11 mounted intermediate itsends. v H v V The steps of this improved method may be somewhat variechthe main and controlling steps being the loading of a quantity of.

- Figure 2 is a plan of a pipeiyha'vinig con-- tacts cast ther'earound as used n electrode holders s milar to that described 1n the tion, the one endof the coil A is provided- 5 with a pipe 6, having a connection inter In carrying out this method the ca p -3 m y be pplied and the coil filled as near-lyas possible With sand'prior-to its connection Wltll tlie pipe 6.") Then the pipefi may be 1 filled with sand from the hopper 8, and thou n WnE ELER, or noicnononen,

the valve ll may be opened topermit the. ,1

compressed air from the pipe 10 to pack the I ,coil A, this operation being sand into the repeated until the coilis filled.

Another Wayoi'carrying out theli nyention 18 to applyithe cap'fel to one .end of the coil A andconnect the other end of the 'c'oil to hopper 8 and .thepipefi, then to open the valve 9 Y'onthe permit the sand to flow into,

the co'iloand pipe 6 then t'oc'lose the vaive H the valve 11 and permit the :cOmpre-ssed air from the pipe 10 to packthe sand into'the coil A, then to close thevalv 'c' Y11 and again open the [valve 9 to cause resh supply of sand tOfiOW into the coil A and, pipe 6,

and open the then again close thevalve'fi valve 11 to again allow-the compressed -air to fi O W fIOHI pipe 10 into the coil and pack the new, supply of sand,

is filled with packedsand, I

Other variations off-the methods herein described may be practiced, but the con trolling" step of packing coil by fluid We claim' The method of preparingcopper pipe coils around which contacts are to he cast sists in closing its open end then passing-fluid under-plied sure'into said pipe coil through its open end to pack thesancLand repeating said operations until said'pipe coil is full of sand. In testimony whereof; 'We have hereunto set our hands.

WALTER JENKINSON;

. sand into the coil, and then packing the sand therein. by compressed air or other fluid.

JOHN L. 'WHEELERQ and repeating said operationsiuntil the coil;

the sand into the pressurewill remain the same,

in ;formi'ng' electrode holders, which 001%; one endof said coil with the exception of a small vent'opening, loading. 1 a quantity of sand intosaid coilfthrough 

